book Maths Puzzle Numerical Ability

(1 1/4)*(-2 3/5)=

Read Solution (Total 0)

book Other Question

Solve the following system of equations both graphically and algebraically (either by substitution or elimination)

-3x - 5y = 22
4x - 7y = -39
My homework problem is this:

X+3[2 5] [12 7]
[1 4] = [0 -8]

The numbers after the 3 are one matrix and the numbers after the equals sign is another matrix.